On 8/20/2019 9:18 PM, Jim Danehy wrote:
ONE DB loss is the LEAST DETECTABLE amount a human can detect.
Not true. One dB IS approximately the smallest change in LOUDNESS that
most listeners can hear, but what matters in radio is signal to noise
ratio, and 1 dB can be the difference between making an not making a
QSO. More important, losses throughout the signal chain add up. Losses
also increase with mismatch.
Hardly if not impossible to notice.
We notice these small things when signals are on the edge of being able
to copy or not. Like when the DX station is trying to pull your weak
signal out his noise.
73, Jim K9YC
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